Electrical-type-writer



4 Sheets-Sheet l.

(No Model.)

J. F. MGLAUGHLIN.

ELEGTRIGAL TYPE WRITER.

No. 888,140. Patented Aug. 21, 1888 M cLazaj/IM fig; www

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(No Model.)

4 Sheets--Sheet' 2, J. P. MGLAUGHLIN.

ELECTRICAL TYPE WRITER.

Patented Aug. 21, 1888. j?? .2..

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4 Sheets-Sheet 3.

(No Model.)

J. P. MGLAUGHLIN.

ELBGTRIGAL TYPE WRITER.

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4 Sheets-Sheet 4.

(No -Mode-1.)

Nm. I H L R HW GE ...UP Aw L 0M MC I .R ULT C J u E oo. 8 QU .lll, 2 g u An.. d nu Lb n Du LI.. n@ P N. PETER Phuwmhogmpher. washington. D. c.

UNITED STATES PATENT EErcE..

JAMES F. MCLAUGHLIN, OF PHILADELPHIA, PENNSYLVANIA.

ELECTRICAL-TYPE-WRITER.

SPECIFICATION forming part of Letters Patent No. 388,140, dated August 21, 1388.

Application filed August 24, 1887. Serial No. 247,764. (No mclle.)

To all whom it may concern.-

Beit known that I, JAMES F. MOLAUGHLIN, a citizen of the United States,residing at Philadelphia, in the county of Philadelphia and State of Pennsylvania, have invented certain new and useful Improvements in Electrical Type-XVrters; and I do hereby declare the following to be a full, clear, and exact description ot' the invention, such as will enable others skilled in the art to which it appert-ains to make and use the same.

My invention relates to an electrical typewriter capable of being used either as an independent electromechanical instrument or as a receiver in conjunction with a suitable transmitter for printing-telegraphs. In this latter instance the instrument described hereinafter is more particularly designed to be utilized in conjunction with my transmitter, which is the subjectmatter of Letters Patent No. 363,158, dated May 17, 1887, and which is shown diagrammatically in the accompanying drawings in connection with the essential subject-matter hereof.

As an independent electro-mechanical typewriter,it consists,essentially, of a mechanicallyarranged key-board carrying the ordinary letters, characters, and punctuation-marks necessary for use in machines of this description. The depression of any key thereof will mechanically arrest the rotation of a revolving disk mounted on a shaft, which carries the type-wheel with the type-letter corresponding to such depressed key in the proper position to be imprinted upon the paper by means of certain auxiliary devices described hereinafter, and such depression at the same instant will effect the closure of a local electrical circuit, by means of which the electro-mechanical printing and letter-spacing mechanisms are operated.

When, as before stated, my instrument is used in conjunction with a transmitter such as shown and described in the before-mentioned Letters Patent, or with any other such analogous instrument, the mechanical key-board is dispensed with and the circuit-closing keyboard of such transmittiiig-instrument is substituted therefor, each key of which is so aror imprint upon the paper-roll both of theloeal receiver and the receiver or receivers at the extremityorextremitiesofthelineorlincs. Vhen desirable or necessary to detach or cnt out either the local receiving-instrumcnt or the receiver at the end of the line, or both at the same time, certain means for accomplishing this rc sult are provided, as will be more fully explained hereinafter.

The construction and arrangement of the particular parts of this invention are substantially the same when the instrument is used as a local type-writer as when electrically connected with a transmitter for printing-telegraphs, except that in the former instance the key-board is operated mechanically with respect to the type-letters and in the latter is electro-mechanical. The spacing-key, however, both as regards the mechanical keyboard and transmitter, is electro-mechanical.

My invention consists, further, in certain details of construction, arrangements, and combination of parts and electrical connections, which will be more fully described hereinafter, and the particular points of novelty in ywhich will be specifically pointed out in the appended claims.

Referring to the acccmpanyin g drawings, Figure l is a side elevation of my improved electrical typewriter, partly in section. Fig. 2 is a top plan view oi the disks and key-board ofthe same. Fig. 3 is an inverted plan view ofthe large disk in which one stop-lng` is em` ployed for two keys. Fig. 4 is a similar view of the large disk in which one stop lug is employed for each and every key. Fig. 5 is a diagram showing the instrument in connection with a transmitter such as described in the before-mentioned Letters Patent. Fig. (i is a detail perspective View, partly in section, of the type-wheel, the upper end of its supporting-shaft, and its securing-nut.

Like letters and numbers of reference indicate corresponding parts in the several views of the drawings.

Before entering into a detailed description of the construction, arrangements, and combinations of parts, it will be hereinafter understood that this invention will be first described as a receiver in circuit with its respective transmittinginstrument at each end of the line, each of said transmitting-instruments being of the improved construction described in the before-mentioned Letters Patent.

A and A represent, respectively, the transmitting and receiving instruments, located, as shown in Fig. 5, at one extremity of a line-circuit, D, having the button-switch 66, and their respective parts capable of being adjusted properly in order to convey or transmit an electrical impulse caused by the depression of any of the circuit-closing keys from the battery C through the instruments A and A over the line D, and at the other extremity (not shown) through instruments corresponding to A and A in an inverse order, the transmitters being, as before stated, of the same construction as illustrated in the before-stated Letters Patent and the respective adjustable parts thereof arranged relatively in a similar manner to that shown in Figs. 2 and 3 of said Letters Patent.

The electrical connections between the transmitter A and the receiver A are as follows:

1 1 indicate a series of wires connecting each retracting-spring 2 2 of the transmitting-instrument with a corresponding electro-mag'- net, 3, in the receiver, it being understood th at when my invention is used in connectionwith a transmitting-instrument such as A each key of said transmitter has a corresponding electro-magnet and ty peletter in the receiver.

4 4 designate a series of short wires electrically connecting one terminal of each helix of the `electro-magnets 3 3 with the transverse rod 5, which in turn is at each end suitably fastened up'n and insulated from-the base 6 of the instrument by the small clips or vbrackets a a, (see Fig. 1,) and is electrically connected with the main battery by means of wire 7 and button-switch 8, while the main battery is connected with the ground, as shown in Figs. 1 and 5. The electro-magnets 3 3,l as before stated, correspond in number and relative situation to the keys lof the instrument A,'and are disposed in two transverse rows or banks upon the base 6 of the receiving-instrument A', the upper pole of each of said magnets being directly under and in close proximity to a corresponding key-lever, 9,which, las will appear hereinafter, acts either as an armature therefor or merely as a mechanical detent. Therefore it must be understood that each magnetA has a corresponding pivoted metallic key-lever which, according g to circumstances, acts either in the capacity the upper surface of the circular base G, and an upright main portion, 13, of sufficient height to support the pivot-rod 11 the requisite distance above the said base. In the top edge or face of this portion 13 is located alongitudinal curved recess, 14, extending the entire width thereof, as shown in Figs. 2 and 5, the object of this construction being toform a bed for the pivot-rod 1l and to furnish a space intervening between the pivot-rod 11 and the bottom of the recess, so as to allow a certain play for each key-lever at its fulcrumpoint. Transversely in the top edge or face of this portion 13 are formed a series of inclined recesses, 15 15, which correspond in number to the number of k ey-levers 9 9,which latter are each perforated at their fulcrumed points and are slipped over the pivot-rod 11, fitting in and being guided by these recesses 15 15, (see Fig. 2,) thereby forming an arcor fan shaped key-board for the purpose of affordingconvenience in manipulation. However, it will be obvious that the keyboard might be arranged in any suitable or desir-` able shape. The two castings 10 10 are electricall y connected with each other by a wire, b.

As before stated,each key-lever is placed directly over the upper pole of its corresponding magnet, and, as shown in Fig. 1, a setscrew, 16, is inserted in each key-lever 9 opposite to and above the upper pole of each electro-magnet 3 for the purpose of limiting or adjusting the play of its respective key-le-t ver when it is used either as an armature or as a detent. The rear free extremities of the said key-levers are each provided with an enlarged curved portion, 17, which serves as a retracting agency for said levers after they` have been released either by the operator or4 by the de-energization ofthe magnets 3 3.

Each portion 17 is provided with an upwardly-projecting metallic escapement pin or lug, 1 8, which is tipped on its upper surface with insulation, 19, the side of said lug being bare, so that electrical contact may be made therewith, in a manner to be hereinafter explained. A lip, 20, projects outwardly from one side of the castings 10,anda binding-post, 21, is screwed down through the said lip 20 for electrically connecting the two rcastings with one pole `of thel local battery E.' The conducting-rod 5, to which a term-inal of the helix of each electro-magnetv 3 is connected, extends longitudinally between the two banks or rows of magnets, and is electrically connected, as before stated, with the main bat` tery. A metallic vertical shaft, 22, passes centrally through the machine, as shown in Fig. 1, and is mounted in suitable bearings in the base 6 and in the frame-work of the elevated platform, which carries the traveling carriage 23. Upon the upper extremity of this shaft'22 is mounted the rotatable typewheel 24, around the periphery' of which l are disposed the letters, symbols, or characters which are necessary for use in printing.

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The type-wheel 24 is centrally perforated, as shown in Fig. 6, and is inserted over the screw-threaded end of the vertical shaft 22, resting upon the shoulder or collar c of the shaft.

A feather or rib, d, is formed vertically on the wall of the perforation 25, and is designed to slip and t loosely in a corresponding groove, e, in the screw-threaded end fof the shaft 22,thereby rigidly keying the type-wheel upon its shaft, yet allowing it to be easily removed and replaced by means ofthe nut 26.

27 designates ahorizontal journal-bracket secured to the frame work of the elevated platform at one end and having the adjusting` screw 29 at the other, which screw fits in a diamond point in the upper end of shaft 22, thereby forming the upper journal-bearing therefor. A

Centrally on the shaft 22 is rigidly mounted a thin metallic disk, 28, of large diameter, having its under plane circular surface studded with a series of spirallydisposed stop lugs or pins, 30 30, which are so relatively arranged as to have differential and relative radial distances from each other,no one stop-lug occupying the same distance from the center of the disk. (See Figs. 3 and 4.) Thus it Will be understood that while the disk 28 is revolving should one of the lugs 30 come in contact with any fixed or adjusted obstruction or obstructions-say, for example, one or more of the lugs 18 of the key-levers 9 9-the said ob st rut-tion or obstructions would onlylie in the path of that particular stop-lug, since the said stops are spirally arranged each at a different and relative distance from the center of the disk.

Each stop-lug 30 is intended to represent one or more corresponding type-letters on the periphery of the type-wheel 24, and each of said stops occupies a relative position on the under surface of the disk 28 with regard to its corresponding type letter or letters on the type-wheel, as will be clearly explained hereinafter.

ln one ease, as shown in Fig. 3, each lug 30 represents two letter-type on the type-wheel 24-that is to say, any two respective lettertypes which are represented by a single and corresponding stop-lug 30 are arranged both with relation to each other and with their corresponding stop 30 upon the periphery of the type-wheel. Suppose, for example', the lng marked g in Fig. 3 is intended to represent two letter type on the type-wheel, such as M' and N. l

Now, in order to clearly comprehend the relative construction of these several parts, it must first be understood that all the several key-levers 9 t) terminate at their free rear extremities exactly on aline corresponding to transverse diameter of thedisk 2S, or, in other words, the ends of all the key-levers, when viewed asillustrated in Fig. 1, are in the same vertical plane, or their longitudinal or basis line of that plane runs diametrically through the disk 28. Again, it will be understood that inasmuch as the disk 28, whose shaft is de signed to be revolved in unison with the shaft (not shown) at the other end of the line, is rigidly keyed to the shaft 22, and that the type-wheel is also similarly keyed to this shaft, the relative positions of the corresponding stop-lugs 30 and the type-letter will be uniformly maintained during the revolution of the shaft; and, furthermore, it will be apparent that when any one lug meets the obstructing end 18 of any key-lever 9 9 the type-letter corresponding to such key-lever and lug must be opposite to the paper, 32, and the impact-lever 33. Now, in order that these requirements may be accurately fulfilled, the relative arrangement of the key-levers, stoplugs and letter-type is as follows: Take the stop-lug marked gin Fig. 3 and designate the same as corresponding to both letters M and N'. Then, in this instance, there would of course be two key-levers of thc key-board for engaging and stopping the revolution of this one stop g, one key-lever bearing the letter l and the other N', and inasmuch as the lug g is farthest from the center of the disk 28 the end of each key-lever (marked, respectively, M and Nin Fig. '2) would be separated from the other a distance equal tothe diameter ofa circle, h, which has a radius equal to the distance of the lng Igto the center z of the disk 28. Consequently this lug g, having been engaged and released by the key-lever marked M in Figs. l and 2, would not come in contact with the key-lever marked N in Fig. 2 until it had completed one-half of its revolution-a'. e., a line, suchas x x, drawn diamctrically through the disk 28 from the lug g would intersect the circle h at the point where this lug g would come into engagement with the key-lever N. y an inspection of Fig. 3 it will be seen that the line .fr a; passes centrally between any two lugs on the opposite side of the disk 28, the object of which construction Will appear hereinafter.

As shown in Fig. 1, the diametrical line drawn from the end of the impact-lever 33 through the type-wheel 24 would be identically at right angles with the horizontal line marking the vertical plane of the ends of the key-levers, and since each stop-lug 30 must engage each lug 18 of its respective key-lever, no matter on which side of the disk 28 the engagement takes place, at a point coincident with this horizontal line, and since the particular typeletter on thc type-wheel which corresponds to its lug 30, which is engaged by any key-lever depressed, must be coincident with the end of the impact-lever 33 at the time its respective lug is stopped, it will be seen that each type-letter is located on the periphery of the type-wheel at a point at right angles with its respective stop-lug, provided the two disks were in the same horizontal plane and the typewvhcel was bounded by the disk 28, as conventionally exemplified in Fig. 2, and inasmuch as each stoplng 30 represents two type-letters on the type-wheel 24, and as any two type letters represented by a' single lug are diametrically opposite to each other in relative location to accord with relative location ofthe ends of the two key-levers which correspond to these two type letters and one lug, it will be obvious that no other lug 30 on the opposite side of the disk must be coincident with the horizontal line marking the ends of the keylevers at the time Va stoplug is engaged by a key-lever. Accordingly, such provision is made by the construction shown in Fig. 3. However, in practiceit may be found desirable to have a stop-lug, 30, for each keylever and type-letter, and to meet such requirement l havedeviscd the disk shown in Fig. 4.

From the foregoing description and the accompanying illustrations it will he conceded, first, that I am able to provide a key-board' carrying both upper and lower case and a type wheel havingv the corresponding type vletters or characters .disposed thercaround,

and, second, to thereby effect the printing of both cases, with stop-lugs equal in number to either onehalf or the whole of the key-levers and type letters. i

Each of the key-levers 9 is made of currentconducting metal and is bent up at its fulcrum-point, as shown in Fig. l, the rear por tion thereof being `in a different horizontal plane from the front portion, for the obvious purpose of being in the same planeas the disk, yet allowing free passage underneath for the revolving lugs 30 30.

The impact-lever 33 is ofa curved or hooked shape, as shown, to conform both tothe size of its reciprocating space and to the character and location of the adjacent parts of the instrument, and is pivotally supported at `its lower end by the screw 35, which bears in a suitable recess in the frame or bracket 36.

37 designates a vertical plate which projects up from and is formed integral with the lever 33, and carries the armature 38 of the electromagnet 39, which in turn is suitably attached opposite to its armature upon the frame 361 The local battery Eis, as before stated, connected with the series' of key-levers by binding-post 2l, castings l() l0, and rod ll, and with one of the electro-magnets of the electromagnetic spacing mechanism for advancing the traveling carriage in a stcp-by-stepmanner by wire 40, binding-post 4l, and wire 42, and said spacing-magnets are connected with the magnet 39 by wires 43 and 44. 45 is the wire connecting the magnet 39 with the brush 46, which is electrically in contact with the revolving shaft 22. f

47 indicates an adjusting screw secured through the vertical plate 48 for limiting the movement of the impact-lever.

The spacing-key of the key-board, instead of only having an electro-magnet, is also provided with a contact-point, 51, which is electricall y connected with the spacing mechanism by a wire, 52, and the spacing-key is connected by means of the rod 1l and casting 10 and binding-post 21, and is not provided with a bent rear portion like the other key-levers 9 9.

'54 designates theV elevated platform for the traveling carriage, and 55 is a rectangular receptacle located underneath and su pported by the front guiderest, 56,- of the platform, and is provided with the lid 57 for gaining access tothe conical receptacle 58, which contains the ink which coats the roller 59, the said roller being in slight contact with the edge of the type-wheel.

60 is a suitable frame dependent from each side bar, 61, of the traveling carriage, and serves as a support for the paper-guiding or pressure rollers 62 and the casing 65 for thc endless roll of paper, 63, which is carried through the aperture 64 in the said casing, up between the rolls 62 62, and around the paperroll..

. Sis an ordinary switch for disconnecting the battery with instrument A.

The operation of my invention in connection with the transmitting-instruments A and A lis as follows: The instruments A and A being in the position shown in Fig. 5, with the button-switch 66 properly pointed, and the operator at the instrument A desires to convey amessagc (say, for example, the words dynamograplrmachine?) over the line D to a distant station, he successively depresses the keys of the instrument A composing this stipu` lated message. Now, in order to clearly follow the operation, we will suppose that the first key depressed is identical with that numbered 67 on the transmitti11g-instrument A. Consequently the depression of said key stops the trailing arm of said instrument A, and will thereby close the circuit and cause the current to be discharged from the battery C simultaneously up through the magnet 3 corresponding to this key, energizing said magnet and causing its corresponding armature key-lever of the receiver A to be attracted by the upper pole of this particular magnet 3, which action thereby elevates the rear extremity ofthe said key-lever until it is in a line of the particular lug 30 which represents the letter D on the type-wheel, (the path of the current in the above instance being from battery C to key 67 through 8, 7, 5, 3, and l.) Then therevolving disk 28 will. instantaneously force` this lug 30 against the lug 18 of this armature-lever 9, thereby stopping said disk with the letter D ICO IIO

opposite to the impact-lever 33. Now, at the Y same instant that the lug 30 engages the before-mentioned electrically-exposed side of the key-lever 9, the circuit Will be instantaneously closed from the local battery vE through the binding-post 2l, casting l0, key-lever 9, lug 30, 4shaft .22, ybrush 46, wire 45, to magnet 39, energizing said magnet. and causing the attraction of its armature 38, and consequently forcing the rubber-tipped end of the impactlever against the paper, 32, and effecting the imprint of the type-letter D thereagainst at the same instant the said type-lever is stopped at the impact-point by the engagement of the key-lever with its lug 30. Then the same impulse discharged from battery E through the magnet 39 energizes the spacing-magnets and effects the operation ofthe letterspacing mechanism at a determinate instant after the imprint is made upon the paper, 32, said spacingmagnets being of a higher resistance than the magnet 39. Now, the impulse imparted by depression ofthekey 67 of transmitter having, as just described, energized the magnet 3, it will instantaneously pass over the Wire 1, connecting this magnet 3 with thekey 67, through the auxiliary parts of key 67, the transmitter A, the line D, the instrument A (not shown) at other extremity of line, the corresponding key of such distant transmitter, the distant transmitter, the respective Wire 1, connecting the corresponding key of distant transmitter with its respective magnet 3 of distant receiver, and to ground, the current While passing over this part having stopped the trailing arm of distant transmitter, thereby indicating the key corresponding to that depressed, and the magnet 3 of distant receiver will be simultaneously energized, thereby effecting the imprint of the particular type-letter corresponding to the type-letter D upon the paper, and the operation of the local circuit, impact-lever, and the letter-spacing mechanism in the same manner as before described. By reference to my aforesaid patent for transmitter it will be seen that the trailing arm of the abovementioned dist-ant transmitter is synchronously arrested by an electro-magnetic brake. However. I have not shown or described the construction and operation of this transmitter herein, since it is deemed only necessary to show the same conventionally herein. (See Fig. 5, in which the brake-magnet may be seen in the diagram of the instrument marked A.) Then the release of the key 67 from the finger of the operator will cle-energize the magnets 3 3, at bot-h extremities of the line, and the armature key-levers 99 willbe retracted to their normal positions by means of their Weighted free ends. Thus the operation is repeated until the end of the word dynamograph7 is reached. The operator now being desirous of making a space between the Word completed (dynamograph) and the next Word to be printed, machine,) he depresses the spacer of instrument A, thereby causing the current to pass over a similar path from battery C to that previously described, and causing the attraction of the armature spacingkey of the receiver A until it makes contact with the point 51, thereby operating the spacing mechanism without effecting an imprint, it being remembered that the spacing-key lever is not provided With a lug, 18. Thus it will be understood that the operator transmits the desired message over the line, and at the same time records the said message at both cX- tremities by the receiver A. Should it now be desired to use the instrument A locally, it is only necessary to disconnect it from its battery C by the button-switch GG. Then in this instance the key-levers 9 9 are used instead of the keys of the transmitter for intercepting the rotation of the disk in a mechanical instead of an electromechanical manner, the impactlever and letter-spacing mechanism being operated in the same manner as before described.

It will also be obvious that when the instrument A is used locally the motor for the shaft 22 need not be specded relatively with any other. The synchronal motor designed to be used is of the construction shown and described in my patent, No. 368,411, dated August 1G, 1887. However, any operative unison device may be substituted. As the type-wheel is revolved it is continually coated by and in contact with the inking-rollers. (Shown in Fig. l.)

Having thus fully described my invention, what I claim, and desire to secure by Letters Patent of the United States, is-m 1. An electrical type-writer comprising a Series of circuit-controlling key-levers, a current-conducting revolving disk provided with a series of stops arrested by the movement of any key-lever, and an electric circuit ineluding said key-levers and disk operated by the movement of any key-lever.

2. An electrical type-Writer comprising a series of circuit-controlling key-levers, a revolving current-conducting disk provided With a series of stops and arranged to be arrested in its rotation by a movement of any one of said key-levers, an electric circuit including said disk and key-levers, and electro-magnetic letterspacing mechanism, substantially as described, also included in and controlled by said electric circuit.

3. An electrical type-writer comprising a series of cireuitcontrolling key-levers, a re volving currentconducting disk provided with a series of stops and arranged to be arrested in its rotation by a movement of any key-lever, an electric circuit inclluling said key-1evers and disk, electro-magnetic printing mech anism, substantially as described, included in and controlled by said electric circuit, and electro-magnetic letter-spacing mechanism, substantially as described, also included in said electric circuit and arranged to be operated thereby at a determinate instant after the printing mechanism.

4. An electrical type-Writer comprising a series of pivoted armature key-levers, electromagnets for attracting said key-levers, and a revolving disk provided with stops arrested by the attraction of any key-lever, as specified.

5. An electrical type-writer comprising a series of pivoted armature key-levers, electromagnets for attracting said key-levers, cir- IIO IZO

cuit-closing mechanism for directing the current through a particular magnet, and a revolving disk provided with stops arrested by. the attraction of any key-lever.

6; An electrical type-writer comprising a series of pivoted armature key-levers and electro-magnets for attracting said key-levers and a main-line circuit severally including said electro-magnets, in combination with a transmitter provided with circuit-closing keys for directing the current through a particular actuating electro-magnet and a local circuit operated by the movement of any of said keylevers, as specified.

7. An electrical type-Writer comprising a series of pivoted armature key-levers, electromagnets for attracting said key-levers, and a revolving stop wheel or disk arrested by the actuation of any key-lever, in combination with a series of circuit closing keys for directing the current through a particular magnet, as specified.

8. An electrical typewriter comprising a series of pivoted armature key-levers, electromagnets for attracting said key-levers, a revolving stop disk or wheel arrested by the attraction of any key-lever, and a local circuit operated also by any movement of said keylevers.

9. An electrical type-Writer comprising a series of pivoted armature key-levers, electromagnets for attracting said key-levers, a revolving stop current-conducting disk or Wheel arrested by the attraction of any key-lever, and a local circuit operated also by any movement of said armature key-levers, in combination with a transmitter provided with a series of circuit-closing keys or directing the current through a particular electro-magnet, as specied.

10. In an electrical type-Writer, a series of current-conducting pivoted key-levers, each included in an electric circuit, a revolving current-conducting disk, also included in said electric circuit and provided with aI series of spirall y and relatively arranged stops, an electric circuit, and a suitable source of electricity, the Whole being arranged so'that the movement of any key-lever Will cause its engagement with its corresponding stop and will simultaneously effect the operation of an electrical circuit by electrical contact with said stops, as speciiied.

11. An electrical type-Writer comprising a series of pivoted armature key-levers having their rear extremities terminating in the same vertical plane, electro-magnets for actuating said key-levers, a revolving disk provided with a series of spirally and relatively arranged stops, circuit-closing mechanism for said magnets,the circuit, andasuitable source lof electricity, the Whole being arranged so that the separate energization of all the magnets will cause a separate movement of all the key-levers, a separate engagement thereof with a single and different stop, and the separate arrestation of the said revolving disk, as specied.

12. An electrical typewriter comprising a series of pivoted armature key-levers having their rear extremities terminating in the same vertical plane and each provided with an automatic retracting agency, electro-magnets for actuating said key-levers, a revolving disk provided with a series of spirally and relatively arranged stops, circuit-closing mechanism for said magnets, and the circuit and a suitn able source f electricity, the Whole being arranged so that the separate encrgization of all the magnets will cause a separate movement of all the key-levers, a separate engagement thereof with a single and diii'erent stop, and the separate arrestation of the said revolving disk, as specified.

13. In an electrical type-Writer, the combination, with a series of pivoted current-conducting key-levers, each included in an electric circuit, and carrying each a symbolof the key-board, of a revolving current-conducting disk, also included in said electric circuit and provided with a series of spirally and relatively arranged stops, each stop corresponding to one or more symbols of the key-board, and a type-Wheel revolving in unison with the stop-disk and provided with a series of typeletters circularly and relatively disposed around the periphery thereof, each type-letter corresponding to one of the symbols of l the key-board and to one or more escapemcnts on the disk, as specified.

14. In an electrical type-Writer, the combination, with a series of pivoted armature keylevers carrying each a symbol of the key-board, electro-magnets for actuating said key-levers, a main-line circuitseverally including said electro-magnets,andcircuit-closing mechanism for directing a current through a particular magnet,of a revolving disk provided with a se ries of spirally and relatively arranged stops, each stop corresponding to one or more symbols of the key-board, and a type-wheel revolving in unison with the stop-disk and provided with a series of type-letters circularly and relatively disposed around the periphery thereof, each type-letter corresponding to one of the symbols of the key-board and to one or more stops on the disk, as specified.

15. In an electrical type-Writer, the combination, with a series of current-conducting pivoted key-levers each included in a local electric circuit, of a revolving current-con ducting disk, also included in said local .circuit and arrested by the movement of any key-lever, a local circuit, the electrical connections, an electro-magnet and armature included in said local circuit, and a pivoted impact-lever operated by said armature.

16. In an electrical type-Writer, the combination, with a series of pivoted current-conducting key-levers each included in a local circuit and carrying a symbol of the key board, of a revolving current-conductin g disk,

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also included in said local circuit and provided with a series of spirally and relatively arranged stops, each stop corresponding to one or more symbols of the key-board, a type- Wlicel revolving in unison with said disk and provided with a series oftype-letters circularly and relatively disposed around its periphery, cach type-letter corresponding to one of the symbols of the. key-board and to one or more of the stops on the disk, a local circuit, electromechanical devices included in said circuit, a pivoted impact-lever provided with a retracting agency operated by said devices, and a traveling paperfeeding mechansim, as specified.

17. The combination, with the series ofcurrent-conducting pivot-ed key-levers included in a local circuit, of a revolving current-conducting disk, the local circuit, a magnet and its armature included in saidci1'cuit,and a pivoted impactlever operated by said armature um i J. F. MCLAUGHLIN.

Vitnesses:

GEO. H. TICHENOR, F. R. HARDING. 

